Selective hydration of nitriles to amides catalysed by PCP pincer supported nickel(<scp>ii</scp>) complexes
作者:J. Borau-Garcia、D. V. Gutsulyak、R. J. Burford、W. E. Piers
DOI:10.1039/c4dt03902e
日期:——
Nickel(ii) hydroxo compounds supported by an electron rich PCP pincer ligand are active catalysts for the selective hydration of a variety of nitriles at low catalyst loadings and mild conditions.
Flexible Coordination of Diphosphine Ligands Leading to cis and trans Pd(0), Pd(II), and Rh(I) Complexes
作者:Cezar C. Comanescu、Vlad M. Iluc
DOI:10.1021/ic5010566
日期:2014.8.18
diphosphine ligands iPr2P–C6H4–X–C6H4–PiPr2 (for ligand L1, X = CH2; for ligand L2, X = CH2CH2) was investigated to determine the preference for cis/transcoordination to palladium(0), palladium(II), and rhodium(I). Increasing the length of the bridging alkyl backbone from one to two carbons changes the geometry of the resulting palladium(II) complexes, with L1 coordinating preferentially cis, while L2
[2+2] Cycloadditions with an Iron Carbene: A Critical Step in Enyne Metathesis
作者:Melissa R. Hoffbauer、Vlad M. Iluc
DOI:10.1021/jacs.0c12175
日期:2021.4.21
complex, [PC(sp2)P}Fe(N2)(PMe3)] ([PC(sp2)P] = (bis[2-(di-isopropylphosphino)phenyl]methylene), which is capable of performing [2+2] cycloaddition reactions in the presence of alkynes. Specifically, η3-vinyl carbenes are formed stoichiometrically through a [2+2] cycloaddition between the alkyne and the metal carbene. Additional reactivity of the η3-vinyl carbenes with alkynes yields a second insertion
Palladium carbene complexes as persistent radicals
作者:C. C. Comanescu、M. Vyushkova、V. M. Iluc
DOI:10.1039/c5sc01441g
日期:——
A series of palladium(ii) persistent radical carbene complexes, [PC˙(sp2)P]PdX (X = Cl, Br, I), was synthesized from the nucleophilic carbene [PC(sp2)P]PdPMe3.
Activation of Water, Ammonia, and Other Small Molecules by PC<sub>carbene</sub>P Nickel Pincer Complexes
作者:Dmitry V. Gutsulyak、Warren E. Piers、Javier Borau-Garcia、Masood Parvez
DOI:10.1021/ja406742n
日期:2013.8.14
Nickel complexes of a PCcarbeneP pincer ligand framework are described. Dehydrobromination of the precursor (PCsp3P)NiBr in the presence of a donor (PPh3 or (NCBu)-Bu-t) leads to the title complexes, which feature a rare nickel-carbene linkage as the pincer ligand anchor point. This strongly donating, nucleophilic carbene center engages in a variety of E-H bond activations (E = H, C, N, O), some of which are reversible. This represents a new mode of bond activation by ligand cooperativity in nickel pincer complexes.